The GermanCarBlog has a story on how an RS4 beat the pants off the German ICE bullet train between Munich and Berlin(600KM). Checkout the
result!

Ok, guys. The results are here from the duel of an Audi RS4 against Germany's bullet train, the ICE.
And the Audi RS4 really did it! He scored the victory in this unusual race. And it was very impressive: he arrived 2 hours (!) earlier than the bullet train! Just to remind you, it was a race over 600 km from Munich to Berlin.
Though we know that the Audi RS4 is really a fast street machine, we also know that the German bullet train isn't the best of all. Nothing comparable to Japan's Shinkansen. So we guess the truth lies somewhere in the middle.
But anyway it stays a sweet victory!
Read the Google-translated racelog here.